make everything completely invisible unless you are holding a special key or something, like phantom rails (ik there is a an invisible bogey but you can still the wood part)
#completely invisible bogey, seats, train parts (like train controls and etc)
glass hound
eternal shadow
Invisible blocks would make some weird hitbox problems
buoyant glen
Wouldn't you be able to accomplish something like that (without the being able to see it with a special key part) if you had copycat bogeys / seats / whatever and filled them with an air block from any mod that adds that?
arctic lily